Thickening & Dewatering

Auxiliary

Consumables

Xinhai mineral processing equipment mainly include: grinding equipment, flotation equipment, dewatering equipment, magnetic separation equipment, and so on. Some of the equipment is Xinhai independent research and development, and has been awarded national patent. View details

Choose the Right Method, So That Manganese Ore Processing Is No Longer Difficult!

2019-07-20 17:41:44 XinHai Views (1885)

Warm Tip: If you want to know more information, like quotation, products, solutions, etc., please Click here, and contact us online.

Manganese is widely distributed in nature. Almost all kinds of ores and silicate rocks contain manganese. In modern industry, manganese and its compounds are widely used in various economic fields, among which iron and steel industry is one of the most important fields, with manganese content up to 90%-95%, mainly used as deoxidizer and desulfurizer in the process of iron making and steelmaking, as well as for making alloys.

Types of Manganese Ores

1. Manganese oxide ore

Manganese oxide ore is mainly secondary oxide ore in deposit produced by the weather. Besides it still contains primary and secondary manganese oxide ore in some sedimentary and hydrothermal deposits. The manganese in manganese oxide ores is mainly pyrolusite, pyrolusite and hydromanganese. The gangue minerals are mainly silicate and carbonate minerals, often growing with iron, phosphorus, nickel, cobalt and other contents.

2. Manganese carbonate ore

Sedimentary manganese carbonate ore are mainly rhodochrosite, calcium rhodochrosite, manganese calcite, ferromanganese and so on. The gangue minerals are mainly silicate and carbonate minerals, often growing sulphur, iron and other impurities. The mineral is more complicatedly. Manganese minerals have a fineness less than micron, which is not easily dissociated, and hard to be separated into a higher concentrate grade.

Manganese processing technology

As for the fine and micro embedded manganese ores, and there are an amount of high phosphate ore, high iron ore and co – (concomitant) beneficial metals. It is quite difficult to be separated. Now, common manganese processing technology includes physics mineral processing technology(washing-screening separation, gravity separation, strong magnetic separation, flotation, combined separation), chemical processing technology(leaching), and special processing technology(fire enrichment) and so on. Points of manganese mineral processing technology are introduced as follows.

1.Washing-screening separation

Washing is mainly using hydraulic washing and mechanical scrubbing to realize the separation of minerals and mud. The common equipment includes washing screen, roller washing scrubber, and chute scrubber. Washing is usually with screening, such as washing with water on vibrating screen and then screening the mineral sands with vibrating screen.

The technology dealing with manganese oxide ores usually crushing ores into 0-6mm to 0-10mm, and then classifying. The coarse minerals are sent to jig separation, and the fine minerals are sent to shaking table separation.

3. Strong magnetic separation

Manganese mineral has weak magnetic(specific susceptibility X=10×10-6~600×10-6cm3/g), which can be effectively recycle in strong magnetic separator with Ho=800-1600kA/m (10000-20000oe). The grade of manganese can increase 4% to 10%.

For the characteristic easy to operate and control, and strong adaption, magnetic separation is wildly used in manganese separation. In recent years, magnetic separation is important in manganese processing technology. All types of strong magnetic separators for coarse, middle, and fine fineness.

The strong magnetic separation – flotation method has good adaptability. The high intensity magnetic separators not only remove the slime effectively, but also improve the selection grade of flotation. Comprehensive manganese concentrate products can be directly obtained by high intensity magnetic – flotation desulfurization. Using sodium petroleum sulfonate instead of oxidized paraffin soap as collector, the separation of pulp can be realized in neutral and normal temperature, and the consumption of medicine and energy can be saved.

Take the so2 leaching method as an example, the manganese ore is mixed with slurry, and the sulfur dioxide gas is injected to convert the manganese oxide in the ore into MnSO4 and MnS2O6. Adding lime milk to filtrate can produce manganese hydroxide precipitation and obtain solid manganese hydroxide after filtration. This method is suitable for the treatment of low grade, micrograined manganese oxide ore.

7. Fire enrichment

Manganese ore fire enrichment method is a kind of method to deal with high phosphorus and high iron difficult to select poor manganese ore, which is generally called manganese rich slag method. It mainly USES the different reducing temperature of manganese, phosphorus and iron to selectively separate manganese, phosphorus and iron by controlling their temperature in blast furnace or electric furnace.

The above is the common manganese ore dressing method, in the actual production, the manganese carbonate ore dressing method mostly USES the strong magnetic separation, the heavy medium dressing method and the flotation method and so on. Manganese oxide ore is mainly used by gravity separation method, which mainly adopts ore washing-gravity separation process or ore washing-reduction roasting magnetic separation-gravity separation process. Of course, for refractory manganese ore often need to combine two or even more than a variety of separation methods.

Xinhai Classic Manganese Processing Plant Project

Due to the changes in the properties of selected ores, the single flotation process in the original separation plant could not fully adapt to the changes, resulting in the flotation recovery rate of less than 30%, and the separation plant was in the state of loss. The customer commissioned Xinhai Mining for new construction and transformation. In order to improve labor production efficiency and economic benefits, Xinhai Mining adopts new equipment and new technology as far as possible, and makes full use of topographic conditions on the basis of existing conditions to build the factory area, which greatly saves the investment of dressing plant.

Xinhai solution:

The technological process of “SO2 manganese leaching + cyanidation silver leaching full wet method” is adopted in the selection stage, while the technological process of “silver slime – fire smelting – silver alloy – silver electrolysis smelting” is adopted in the smelting stage. Finally, the total recovery of manganese and silver reached more than 80%.